diff --git a/addons/web/static/src/js/chrome/action_manager_act_window.js b/addons/web/static/src/js/chrome/action_manager_act_window.js
index 7963af8ec32..9cfa99a9e7d 100644
--- a/addons/web/static/src/js/chrome/action_manager_act_window.js
+++ b/addons/web/static/src/js/chrome/action_manager_act_window.js
@@ -329,7 +329,7 @@ ActionManager.include({
     _generateActionFlags: function (action) {
         var popup = action.target === 'new';
         var inline = action.target === 'inline';
-        var form = _.str.startsWith(action.view_mode, 'form');
+        var form = action.views[0][1] === 'form';
         return _.defaults({}, action.flags, {
             disableCustomFilters: action.context && action.context.search_disable_custom_filters,
             footerToButtons: popup,
diff --git a/addons/web/static/tests/chrome/action_manager_tests.js b/addons/web/static/tests/chrome/action_manager_tests.js
index c85e8a8c42c..90b3c1bf510 100644
--- a/addons/web/static/tests/chrome/action_manager_tests.js
+++ b/addons/web/static/tests/chrome/action_manager_tests.js
@@ -66,7 +66,6 @@ QUnit.module('ActionManager', {
             res_model: 'partner',
             target: 'new',
             type: 'ir.actions.act_window',
-            view_mode: 'form',
             views: [[false, 'form']],
         }, {
             id: 6,
@@ -75,7 +74,6 @@ QUnit.module('ActionManager', {
             res_model: 'partner',
             target: 'inline',
             type: 'ir.actions.act_window',
-            view_mode: 'form',
             views: [[false, 'form']],
         }, {
             id: 7,
@@ -135,7 +133,6 @@ QUnit.module('ActionManager', {
 
         this.actions[3].views = [[false, 'form']];
         this.actions[3].target = 'inline';
-        this.actions[3].view_mode = 'form';
 
         var actionManager = createActionManager({
             actions: this.actions,